CPL vs ND Filters: What's the Difference for Drones and Action Cameras?

Published: October 27, 2026
Category: Camera Accessories
Author: STARTRC Editorial Team
Reading Time: 8 minutes

CPL and ND filters are two of the most useful camera accessories for outdoor photography and video. Both can change the way a scene looks, but they solve different problems.

A CPL (circular polarizing) filter helps control certain reflections and glare. An ND (neutral density) filter reduces the amount of light entering the camera, allowing greater control over exposure and shutter speed.

For drone pilots and action camera users, understanding this difference is important. The right filter can help you manage bright skies, reflective water, and outdoor video exposure. The wrong one may have little effect—or make filming more difficult.

Here's how to choose.

Neither filter is universally better. The choice depends on what you want to achieve.

What Is a CPL Filter?

A CPL filter uses polarization to reduce certain types of reflected light, particularly reflections from non-metallic surfaces.

For example, when filming a lake from above, a CPL filter may reduce some surface glare, making details beneath the water easier to see.

It can also affect reflections from glass and make foliage appear richer by reducing reflected light from leaves.

When Should You Use a CPL Filter?

Consider a CPL filter when:

• Shooting lakes, rivers, or coastal landscapes

• Photographing vegetation with noticeable surface reflections

• Filming through certain glass surfaces

• Trying to control glare in outdoor scenes

The effect depends on the angle between the camera, the light source, and the reflective surface.

A CPL filter does not remove every reflection, and it is not a substitute for an ND filter.

What About CPL Filters on Drones?

Drone photography introduces an additional consideration: the camera's direction can change throughout a flight.

As the drone turns or changes its viewing angle, the polarizing effect may change. Wide landscape scenes can also show uneven sky darkening under certain lighting conditions.

For this reason, CPL filters are often more predictable when the shot direction and lighting conditions are planned in advance.

What Is an ND Filter?

An ND filter reduces the amount of light reaching the camera sensor.

Think of it as sunglasses for your camera, although a good ND filter is designed to reduce light without significantly altering the colors of the scene.

ND filters are especially useful when you want to maintain a particular shutter speed in bright conditions.

Why Are ND Filters Useful for Video?

Video creators often choose shutter speeds in relation to frame rate.

For example, when filming at 30 fps, a shutter speed near 1/60 second is a common starting point for natural-looking motion blur.

In strong daylight, using that shutter speed without an ND filter may produce an overexposed image, depending on the camera's aperture, ISO, and lighting conditions.

An ND filter reduces incoming light, making the desired exposure settings easier to achieve.

However, the familiar 180-degree shutter guideline is a creative convention, not a rule that every video must follow.

CPL vs ND for Drone Photography

Drone cameras frequently capture wide outdoor scenes with changing light and reflective surfaces.

Both CPL and ND filters can be useful, but for different reasons.

Scenario 1: Flying Over Water

If reflections on the water are distracting, a CPL filter may help control some of that glare.

If the goal is to maintain a slower shutter speed while recording bright daylight video, an ND filter is generally the more relevant choice.

Scenario 2: Recording Smooth Cinematic Motion

When filming moving subjects or performing slow aerial camera movements, an ND filter may help you use a shutter speed that produces the desired motion blur.

The effect depends on the camera's exposure controls and the amount of movement in the scene.

Scenario 3: Shooting Landscapes

A CPL filter may improve the appearance of some foliage and reflective surfaces.

An ND filter may be useful for longer exposures or video exposure control.

The practical rule: choose CPL to manage reflections and ND to manage light.

For model-specific options, STARTRC offers filter sets for cameras such as the DJI Mini 5 Pro, Mavic 4 Pro, and DJI Flip.

Explore the STARTRC Filters collection to compare compatible products.

CPL vs ND for Action Camera Video

Action cameras are often used in bright, unpredictable environments.

Cycling, hiking, water sports, and travel filming may involve rapid changes in lighting and camera direction.

When an ND Filter Makes Sense

An ND filter can help when filming in consistent bright daylight and you want more control over shutter speed.

However, a strong ND filter can be inconvenient when moving quickly between sunlight and shade.

For fast-moving activities, automatic exposure settings may sometimes be more practical than a fixed slow shutter speed.

When a CPL Filter Makes Sense

A CPL filter may be useful for controlled shots of water, scenery, or reflective surfaces.

For cameras that frequently change direction, the polarizing effect may vary during recording.

This makes CPL filters less predictable for some action sequences than for stationary landscape shots.

STARTRC's filter range includes model-specific CPL and ND sets for DJI Osmo Action 6 and Osmo Nano.

Always verify compatibility with the exact camera model before ordering.

What About VND and ND/PL Filters?

Two additional filter types are worth understanding.

VND: Variable Neutral Density

A VND filter allows you to adjust light reduction without switching between several fixed ND filters.

This can be convenient when lighting changes gradually or when you need to fine-tune exposure.

However, some VND designs can produce uneven darkening, color shifts, or an X-shaped pattern at certain settings, particularly toward their extremes.

STARTRC also offers a VND2–5 stop filter designed for Pocket 4 Pro, illustrating a different approach to exposure control from fixed ND sets.

ND/PL: Neutral Density and Polarization Combined

An ND/PL filter combines light reduction with a polarizing effect.

It can be useful when you want to control exposure and reflections at the same time.

But ND/PL is not the same as a regular ND filter. The polarizing effect still depends on the direction of light and the camera angle.

Also, a product set containing separate CPL and ND filters should not automatically be described as an ND/PL combination filter.

Always check the actual filter construction and product specifications.

How to Choose the Right Filter for Your Camera

Before buying, answer these questions.

1. What problem are you trying to solve?

Choose CPL when controlling reflections is the main goal. Choose ND when reducing light for exposure or shutter-speed control is the priority.

2. Are you shooting photos or video?

Your intended shutter speed and exposure settings matter, particularly for video.

3. How consistent is the lighting?

Fixed ND filters can work well in predictable conditions. Rapidly changing light may require more frequent adjustments.

4. Is the filter compatible with your exact camera?

Drone and action camera filters often use model-specific mounting designs. Even visually similar camera models may require different filters.

5. Does the filter affect image quality or camera operation?

Check optical quality, secure attachment, lens clearance, and any restrictions from the camera or accessory manufacturer.

A lightweight, well-fitted filter is particularly important on cameras with moving gimbals.

What Retailers and Distributors Should Consider

For retailers and wholesale buyers, filter selection involves more than choosing between CPL and ND.

A practical product assortment should consider the camera models customers actually use, the ND strengths most relevant to their shooting activities, and whether buyers prefer individual filters or multi-filter sets.

Key purchasing considerations include:

• Exact camera-model compatibility

• Included filter types and ND strengths

• Packaging and product identification

• Optical and material specifications

• Installation instructions and after-sales support

• Replenishment availability and order requirements

For example, a drone-focused assortment may include several fixed ND strengths and a CPL option, while a creator-focused range may also include compatible VND products.

STARTRC offers model-specific camera filter accessories for distributors, retailers, and online sellers.

Browse the STARTRC Filters collection or contact the sales team for current product specifications, packaging details, and wholesale purchasing information.

Frequently Asked Questions

Is a CPL filter better than an ND filter?

Neither is inherently better. CPL filters are designed to manage certain reflections, while ND filters reduce incoming light. The right choice depends on the shooting goal.

Can an ND filter reduce reflections?

An ND filter darkens the overall image but does not selectively remove polarized reflections in the way a CPL filter can.

Can I use CPL and ND filters together?

Yes, if the camera and mounting system support the combination. However, stacking filters may introduce vignetting, optical artifacts, or mechanical compatibility issues.

Do I need an ND filter for drone video?

Not always. ND filters can be useful for controlling shutter speed in bright conditions, but their usefulness depends on the lighting, camera settings, and intended visual style.

Is ND32 better than ND16?

ND32 blocks one additional stop of light compared with ND16. It is not universally better; it is simply stronger.

Is a VND filter the same as a CPL filter?

No. A VND filter primarily adjusts light reduction, while a CPL filter is used to control certain reflections. Although some VND designs use polarizing elements, their intended functions are different.

Final Thoughts

The difference between CPL and ND filters is straightforward: CPL controls certain reflections; ND controls the amount of light entering the camera.

For drone photography, CPL can be useful around water and reflective landscapes, while ND helps with exposure and shutter-speed control.

For action camera video, the best choice depends on lighting consistency, movement, and how much manual control you want over the image.

Start with the shooting problem you want to solve, then choose a filter that fits your camera and workflow.

Explore STARTRC camera filters for model-specific options for drones, action cameras, and handheld cameras.